Files with .ulaw extension contain raw CCITT/ITU G.711 u-Law audio data in a format used in US telephony systems. This uncompressed format can be played back by various audio programs. To open .ulaw files, use programs like Awave Studio or NCH Switch. To convert them, find an audio converter that supports the .ulaw format.
The .ulaw file extension is classified as an audio file format. It contains binary data saved in the standard u-Law format used in US telephony. When double-clicking a .ulaw file in Windows, if the operating system does not recognize the extension, you may receive a message to select an app to open the file.
The u-Law algorithm is a companding algorithm used primarily in 8-bit PCM digital telecommunication systems in North America and Japan. It is an uncompressed format for raw audio data that can be edited or converted using various software tools.
The key to opening an unknown .ulaw file is finding a program that recognizes and supports that file type. Free online tools and apps can allow viewing, editing, converting, merging, splitting and comparing .ulaw files without needing to install anything.
Audacity
VLC Media Player
Adobe Audition